24x10.5x20=over 20gal. I'm not sure on what all could go in 20. I know one whites frog can be happy in there. Lots of branches to climb, hiding spots, 24inchrs high is perfect. Looks like u were looking at smaller frogs. I'd check care sheets on ones you're interested in. By the way, whites are the only frog you can handle on occasion. I own these, do of course my suggestion leans twards my opinion. Just make sure to give them plenty of time to adjust. I say get the tank, set it up, regulate temps fir a while, then bring frog ot frogs home.good luck making decision.